Gas-engine attachment



March 18 1924.

G. R. MOATS ET AL GAS ENGINE ATTACHMENT Filed Feb. 28'. 1925 C/m/o e.fle z/vac/ gayfl maafa INVENTORS WITNESS:

ATTORNEY Patented Mar. 18, 1924.

UNITED STATES PATENT P OFFICE."

GUY R. MOATS AND CLAUDE B. REXBOAD, OF HARRISVILLE, WEST VIRGINIA.

GAS-ENGINE ATTACHMENT.

Application filed February 28, 1923. Serial No. 621,873.

To all whom it may concern: 7

Be it known that we, GUY R. MOATS and CLAUDE B. RExRoAD citizens of theUnited States, residing-at I-larrisville, in the county of Ritchie andState of West Virginia, have invented new and useful Improvements inGas-Engine Attachments, of which the following is a specification.

An object of this invention is to produce an air mixer for gas enginesof a construction whereby a rich or lean mixture may be delivered to theengine cylinders as oocasion requires.

A further and important object of the invention is to produce, in a gasmixing device for engines, means, in the nature of a headed valve forclosing the gas inlet to the mixing chamber, and wherein said valve isunseated only by the suction from the engine, and wherein means, in thenature of an atmospheric air admitting sleeve surrounds the valve seatand has a flared mouth directed toward but out of contact with the headof the valve whereby the adjustment of the sleeve will regulate theadmission of airinto the mixing chamber, and as a consequence regulatethe seating and unseating of the valve by the engine suction, andfurthermore to cause tobe delivered to the engine cylinders either arich or lean mixture.

A still further, and also important object of the invention is toproduce a mixmg chamber for gas engines in which the gas inlet may beconnected with a gasometer when natural or artificial gas by varying orhigh pressure is employed, and in which the inlet is normally closed bya valve having a disk head and which is unseated only by the suctionfrom the engine, the valve seat being surrounded by an atmospheric airinlet sleeve having its mouth fiared'inwardly toward but out of contactwith the head of the valve and adjustable with respect thereto wherebytovary the quantity of air admitted into the mixing chamber andconsequently regulate the seating and unseating of the valve by theengine'suction, in accordance with the adjustment of the sleeve towardor away from the valve head, such adjustment also regulating the mixturein the mixing chamber, adjustable spring means being provided forcontacting engagement with the valve stem when the valve "is at alltimes provide a passage therebetween,"

said sleeve being adjustable withrespect to the valve head to regulatethe admission of air to the mixing chamber as well as to provide apassage for back fire from the en-, gine should the same occur, while inthe sleeve there is a choker valve that is normally in open position butis movable to closed position to permit of the easy starting of theengine.

To the attainment of the foregoing and many other objects which willpresent themselves as the nature of the invention is better understood,reference is to be had to the drawing Which accompanies and which formspart of this application.

In the drawing Figure 1 is an approximately centralvertical'longitudinal sectional view through the improvement.

' Figure 2 is a top plan view thereof.

Figure 3 is a bottom plan View of the valve. 1

Figure 4 is a. side elevation of the air inlet sleeve. T

In the drawing, like characters denote corresponding parts throughoutthe several views.

Referring' now to the drawing in detail, the

numeral 1 designates the cylindrical casing ofour improvement. Thecasing is integrally formed with an inwardly directed pipe element 2having an inwardly directed branch 3 disposed centrally with respect tothe casing 1. The branch 3 has its mouth flared inwardly to provide aseat for a frusto-conical valve 4. The valve has'an enlarged headportion inthe nature of a outstanding flange that overlies the saidwidened end of the casing. Above the head there is a semi-cylindricalhollow member 10 having its edge flanged outwardly, as at 11, to overliethe flange 9. and pass ng through the flanges 11 and 9 and enteringthreaded orifices in the widened or thickened end of the casing 1 thereare the shanks of screws 12. The end of the stem 6 which enters thehollow chamber 10 1s kerfed, as at 13 and is disposed opposite but notin contact with the straight end 14 of an arched spring 15. The springis secured to one side of the chamber by removable means, such as ascrew 16. V

The chamber 10 iscentrally formed with a threaded opening that receivestherethrough the shank of a screw having a milled head 16. Secured" onthetop of the chamber 19 there is a spring finger 171designed to engagewith the milled head 16 of the screw to hold the same adjusted.Theturning of the screw will, of course, adjust the arched spring tobring its stralght end 14 toward or to permit the, same to spring awayfrom the kerfed end of the stem 6.

By providing the stem with thegkert 13 a suitable implement such as ascrew driver may be inserted therein after the chamber 10 is removed,and the turning thereof will cause the grinding of the valve 4 on itsseat.

In a line with the pipe 2 the casing 1 has an outstanding interiorlythreaded ring enlargement or boss 18 in which is screwed one:

end of a pipe 19 that is connected with a gasometer when natural gas orartificial gas of varying or high pressure is employed. The gas passagethrough the pipe 19 may be controlled by a valve (not shown), ifdesired.

In the chamber 1 there is an air inlet regulatingsleeve 20. The sleeve20 has one of its sides fromjits inner end notched, as at 21 to receivetherethrough the pipe element 2 of the casing. The sleeve-2O has itsupper end or mouth flared inwardly, as at 23, the said flared portionbeing disposed in close proinixity but not in contact with the disk head5 of the valve 4. The sleeve is held adjusted in the casing 1 through.the medium of a set screw 22 but, of course, other suitable means may beprovided for this purpose.

The sleeveis provided with an elongated longitudinally disposed opening23 for the passage of the shaft 24 of choker valve 25. In the showing ofthe drawing, the shaft 24 has a link secured to one of its ends and tothis link there is an'operating rod 25. The choker valve 25 is normallyin full open position and is only closed when a full flow of gas isdesired on the starting of the engine. The portion of the casing 1,above the mouth of the air inlet valve stem to meet'requirements.

sleeve 20 provides a mixing chamber and is, for distinction, indicatedin the drawing by the numeral 26. The inlet chamber has .an outletopening 27 surrounded by a suitable threaded pipe extension 28 connectedto the throttle tube for the intake manifold of the engine (not shown).

As disclosed in Figure 1 of the drawing, we removably attach to thelower end of the casing 1 a pipe element 29 which is directed from thebuilding in which the device is installed to the upper atmosphere.

In operation, the choke valve, as previously stated, 1S. first closed toadmit a full charge of gas to the mixing chamber on the I starting ofthe engine The choke valve-is then moved to fully open position so thatatmospheric air is admitted throughthe sleeve 20 around the head!) ofthe valve 4 into the mixing chamber 26.

suction from the engine. The quantity of air admitted through the sleeveinto the mixing chamber, however, regulates the unseat the simple meansprovidecha rich or lean.

mixture may be readily obtained in the mix; mg chamber, gttllCl incidentto the passage that is always maintained between the flared 'mouth 23 ofthe sleeve 20 and the disk head 5 of the valve, backfiring by the enginewill find an outlet through. this passage.

to any of the parts construction it will be seen that the spring doesnot normally contact the valveor'the valve seat so that undue frictionwhich would be occasioned by such contact or by a coiled springsurrounding the valve stem between the sleeve 7 and the head 5 of thevalve is effectively dispensed with. The adjustment of the spring, aspreviously stated, is accomplished by the turning of the screw 16sothat'the arm 14 of the said spring may be positioned desired distancesfliom the 3 P viding the dome-sha Jed chamber 10, no grease or foreignsu stances can contact with the stem 6 or with the interior of the Thisair does not in any way influence the valve, and the, unseatmg of thevalveoccurs only'by'the 011 high speed casing 1 and the free sliding ofthe valve stem through this guide is thereby effectively assured.

By providing the improvement with the detachable pipe member 29 thatleads to the atmosphere, all requirements of fire underwriters iscomplied with inasmuch as the same provides a safety device for escapinggas should the valve 4:, for any reason become clogged or scaled toprevent the proper seating thereof when the engine is stopped.

It is believed that the foregoing description, when taken in connectionwith the drawing will full} set forth the construction, operation andadvantages of our improvement to those skilled in the art to which suchinventions relate, but it is to be understood that while we have hereinset forth a satisfactory embodiment of our device the same issusceptible to such changes and modifications as fall within the scopeof our claims without departing from the spirit of our invention.

The straight end of the spring 15 not only serves as a means for quicklyreseating the valve when the same is elevated an undesirable distanceabove its seat, but by adjusting the screw 16, the said end 14 of thespring may be brought to such position with respect to the end of thestem 6 as to regulate the opening of the valve by the suction from theengine.

Having described the invention, we claim 1. In a gas and air mixer forgas engines, a mixing chamber having a port connected with the gasintakeof a gas engine, and a gas inlet pipe having its mouth flared to providea valve seat which is arranged below the port, a frusto-conical valvefor the seat, a disk head thereon, a stem for the valve having an outerkerfed end, guide means for the valve stem, an air inlet sleeve havingan inwardly flared mouth arranged below, in

' close proximity to, and surrounding the disk head of the valve, achoke valve in the sleeve, and means holding the sleeve adjusted withrespect to the head of the valve.

2. In a gas and air mixer for gas engines, a mixing chamber having aport connected with the gas intake of a gas engine, a gas inletproviding a valve seat in the chamber below the port, a frusto-conicalvalve on the seat having a disk head and a kerfed stem, and whosecombined weight normally retains the valve seated, guide means for thevalve stem, spring means in the path of contact with the stem forexerting an impelling fore thereagainst to quickly-seat the valve whenthe latter has been moved too far off of its seat by the suction of theengine, an air inlet sleeve having an inwardly flared mouth disposedbelow the disk head of the valve to direct air currents through thepassage therebetween into the mixing chamber, and likewise to directsuch air currents against the under face of the disk head of the valve,a choke valve. in the sleeve, operating means therefor, and meansholding the sleeve adjusted with respect to the valve head.

3. In a gas and air mixer for gas engines, a cylindrical casing having aport adjacent its upper end connected with the gas intake of a gasengine, a pipe member therebelow having an upwardly directed branchreamed to provide a valve seat, a valved pipe connected with the firstmentioned pipe and with a gasometer, a frusto-conical valve on the valveseat having a disk head and a stem whose outer end is kerfed and whosecombined weight normally retains the valve seated, a member closing theupper end of the casing having a depending sleeve providing a guidethrough which the valve stem freely passes, a dome-shaped chambersecured to said member and to the casing, an

arched spring having one end secured in thechamber and its opposite endbent to form a straight portion disposed above but not in contact withthe valve stem whereby to impel the valve to seated position when thesame has been raised too far above its seat by suction from the engine,means operated exteriorly of the chamber for adjusting the straight endof the spring with respect to the valve stem, latching means for saidadjusting means, an air inlet sleeve in the bot- .tom of the casing,notched toprovide for the passage of the gas intake pipe therethroughand having its upper end rounded inwardly toward the under face of thedisk head of the valve, the mouth of the sleeve being of a slightlygreater area than the diameter of the disk head, means holding thesleeve adjusted with respect to the disk head to regulate the inflow ofair through the sleeve into the mixing chamber provided above the valveand to likewise direct such currents of air against the under face ofthe head of the valve, a choker valve in the sleeve, operating meanstherefor, and a conductor pipe secured to the lower end of the casingand communicating with the atmosphere.

In testimony whereof we aflix our signatures.

GUY R. MOA'IS. CLAUDE REXROAD.

